I've noticed the same thing with regards to the CAEN-BLOCK-CENCN-2-POE.
I was told that there is a known issue with the later versions of Toolbox and these devices.
IP ID conversion makes sense because Slot 1 ethernet is connected to Cresnet A and Slot 2 ethernet is Cresnet B.
This really shows up when trying to use D3Pro.? It can't verify any devices connected to the Cresnet on them.
Even the ethernet to Cresnet internal card on these devices shows as offline.
I was told by tech support to back down my Toolbox to 3.03.424 and this would go away.
I haven't tried it yet because, right now, it's just a minor annoyance.
